SELECT 
  cscart_bm_snapping.grid_id as grid_id, 
  cscart_bm_snapping.block_id as block_id, 
  IFNULL(
    dynamic_object_content.content, 
    default_content.content
  ) as content, 
  IFNULL(
    dynamic_object_content.object_id, 
    default_content.object_id
  ) AS object_id, 
  IFNULL(
    dynamic_object_content.object_type, 
    default_content.object_type
  ) AS object_type, 
  cscart_bm_block_statuses.object_ids as object_ids, 
  cscart_bm_snapping.*, 
  cscart_bm_blocks.*, 
  cscart_bm_blocks_descriptions.* 
FROM 
  cscart_bm_snapping 
  LEFT JOIN cscart_bm_blocks ON cscart_bm_blocks.block_id = cscart_bm_snapping.block_id 
  LEFT JOIN cscart_bm_block_statuses ON cscart_bm_snapping.snapping_id = cscart_bm_block_statuses.snapping_id 
  AND cscart_bm_block_statuses.object_type LIKE '' 
  LEFT JOIN cscart_bm_blocks_descriptions ON cscart_bm_blocks.block_id = cscart_bm_blocks_descriptions.block_id 
  LEFT JOIN cscart_bm_blocks_content AS default_content ON cscart_bm_blocks.block_id = default_content.block_id 
  AND cscart_bm_blocks_descriptions.lang_code = default_content.lang_code 
  AND default_content.snapping_id = 0 
  AND default_content.object_id = 0 
  AND default_content.object_type like '' 
  LEFT JOIN cscart_bm_blocks_content AS dynamic_object_content ON cscart_bm_blocks.block_id = dynamic_object_content.block_id 
  AND cscart_bm_blocks_descriptions.lang_code = dynamic_object_content.lang_code 
  AND dynamic_object_content.object_id = 0 
  AND dynamic_object_content.object_type like '' 
WHERE 
  cscart_bm_snapping.grid_id IN (
    21302, 21303, 21304, 21306, 21309, 21310, 
    21311, 21312, 21305, 21307, 21308, 
    21313, 21314, 21320, 21315, 21316, 
    21321, 21317, 21318, 21319, 22416, 
    21322, 21323, 21324, 21325, 21326, 
    21327, 21328, 21329, 21330, 21331, 
    21332, 21333, 21334, 21335, 21336, 
    21337, 21338, 21339, 21340
  ) 
  AND cscart_bm_blocks_descriptions.lang_code = 'en' 
  AND cscart_bm_blocks.company_id = 1 
ORDER BY 
  cscart_bm_snapping.order, 
  cscart_bm_snapping.block_id

Query time 0.03356

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "3518.71"
    },
    "ordering_operation": {
      "using_temporary_table": true,
      "using_filesort": true,
      "cost_info": {
        "sort_cost": "2168.12"
      },
      "nested_loop": [
        {
          "table": {
            "table_name": "cscart_bm_blocks_descriptions",
            "access_type": "ALL",
            "possible_keys": [
              "PRIMARY"
            ],
            "rows_examined_per_scan": 4000,
            "rows_produced_per_join": 400,
            "filtered": "10.00",
            "cost_info": {
              "read_cost": "367.42",
              "eval_cost": "40.00",
              "prefix_cost": "407.42",
              "data_read_per_join": "81K"
            },
            "used_columns": [
              "block_id",
              "lang_code",
              "name"
            ],
            "attached_condition": "((`poscentr_upgrade422`.`cscart_bm_blocks_descriptions`.`lang_code` = 'en') and (`poscentr_upgrade422`.`cscart_bm_blocks_descriptions`.`block_id` is not null))"
          }
        },
        {
          "table": {
            "table_name": "cscart_bm_blocks",
            "access_type": "eq_ref",
            "possible_keys": [
              "PRIMARY",
              "idx_blocks_main",
              "idx_blocks_company"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id"
            ],
            "key_length": "4",
            "ref": [
              "poscentr_upgrade422.cscart_bm_blocks_descriptions.block_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 20,
            "filtered": "5.00",
            "cost_info": {
              "read_cost": "100.00",
              "eval_cost": "2.00",
              "prefix_cost": "547.42",
              "data_read_per_join": "4K"
            },
            "used_columns": [
              "block_id",
              "type",
              "properties",
              "company_id",
              "storefront_id"
            ],
            "attached_condition": "(`poscentr_upgrade422`.`cscart_bm_blocks`.`company_id` = 1)"
          }
        },
        {
          "table": {
            "table_name": "cscart_bm_snapping",
            "access_type": "ref",
            "possible_keys": [
              "idx_snapping_runtime",
              "idx_snapping_block"
            ],
            "key": "idx_snapping_block",
            "used_key_parts": [
              "block_id"
            ],
            "key_length": "4",
            "ref": [
              "poscentr_upgrade422.cscart_bm_blocks_descriptions.block_id"
            ],
            "rows_examined_per_scan": 5,
            "rows_produced_per_join": 1,
            "filtered": "1.16",
            "cost_info": {
              "read_cost": "25.00",
              "eval_cost": "0.12",
              "prefix_cost": "582.42",
              "data_read_per_join": "918"
            },
            "used_columns": [
              "snapping_id",
              "block_id",
              "grid_id",
              "wrapper",
              "user_class",
              "order",
              "status"
            ],
            "attached_condition": "(`poscentr_upgrade422`.`cscart_bm_snapping`.`grid_id` in (21302,21303,21304,21306,21309,21310,21311,21312,21305,21307,21308,21313,21314,21320,21315,21316,21321,21317,21318,21319,22416,21322,21323,21324,21325,21326,21327,21328,21329,21330,21331,21332,21333,21334,21335,21336,21337,21338,21339,21340))"
          }
        },
        {
          "table": {
            "table_name": "cscart_bm_block_statuses",
            "access_type": "ref",
            "possible_keys": [
              "snapping_id",
              "snapping_id_2",
              "snapping_id_3"
            ],
            "key": "snapping_id_2",
            "used_key_parts": [
              "snapping_id"
            ],
            "key_length": "4",
            "ref": [
              "poscentr_upgrade422.cscart_bm_snapping.snapping_id"
            ],
            "rows_examined_per_scan": 1,
            "rows_produced_per_join": 1,
            "filtered": "100.00",
            "index_condition": "<if>(is_not_null_compl(cscart_bm_block_statuses), ((`poscentr_upgrade422`.`cscart_bm_snapping`.`snapping_id` = `poscentr_upgrade422`.`cscart_bm_block_statuses`.`snapping_id`) and (`poscentr_upgrade422`.`cscart_bm_block_statuses`.`object_type` like '')), true)",
            "cost_info": {
              "read_cost": "0.29",
              "eval_cost": "0.12",
              "prefix_cost": "582.82",
              "data_read_per_join": "139"
            },
            "used_columns": [
              "snapping_id",
              "object_ids",
              "object_type"
            ]
          }
        },
        {
          "table": {
            "table_name": "default_content",
            "access_type": "ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id",
              "snapping_id",
              "lang_code",
              "object_id"
            ],
            "key_length": "18",
            "ref": [
              "poscentr_upgrade422.cscart_bm_blocks_descriptions.block_id",
              "const",
              "poscentr_upgrade422.cscart_bm_blocks_descriptions.lang_code",
              "const"
            ],
            "rows_examined_per_scan": 22,
            "rows_produced_per_join": 25,
            "filtered": "100.00",
            "index_condition": "<if>(is_not_null_compl(default_content), (`poscentr_upgrade422`.`default_content`.`object_type` like ''), true)",
            "cost_info": {
              "read_cost": "6.38",
              "eval_cost": "2.55",
              "prefix_cost": "591.75",
              "data_read_per_join": "5K"
            },
            "used_columns": [
              "snapping_id",
              "object_id",
              "object_type",
              "block_id",
              "lang_code",
              "content"
            ]
          }
        },
        {
          "table": {
            "table_name": "dynamic_object_content",
            "access_type": "ref",
            "possible_keys": [
              "PRIMARY"
            ],
            "key": "PRIMARY",
            "used_key_parts": [
              "block_id"
            ],
            "key_length": "4",
            "ref": [
              "poscentr_upgrade422.cscart_bm_blocks_descriptions.block_id"
            ],
            "rows_examined_per_scan": 85,
            "rows_produced_per_join": 2168,
            "filtered": "100.00",
            "index_condition": "<if>(is_not_null_compl(dynamic_object_content), ((`poscentr_upgrade422`.`dynamic_object_content`.`object_id` = 0) and (`poscentr_upgrade422`.`dynamic_object_content`.`lang_code` = `poscentr_upgrade422`.`cscart_bm_blocks_descriptions`.`lang_code`) and (`poscentr_upgrade422`.`dynamic_object_content`.`object_type` like '')), true)",
            "cost_info": {
              "read_cost": "542.03",
              "eval_cost": "216.81",
              "prefix_cost": "1350.59",
              "data_read_per_join": "474K"
            },
            "used_columns": [
              "object_id",
              "object_type",
              "block_id",
              "lang_code",
              "content"
            ]
          }
        }
      ]
    }
  }
}