SELECT 
  `C`.`category_id`, 
  `C`.`services`, 
  `CD`.`category`, 
  `CD`.`icon`, 
  `CD`.`counts`, 
  `CD`.`products_count` 
FROM 
  `cscart_categories` AS `C` 
  LEFT JOIN `cscart_category_descriptions` AS `CD` ON `C`.`category_id` = `CD`.`category_id` 
WHERE 
  `C`.`status` = 'A' 
  AND `C`.`parent_id` = 568

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "9.05"
    },
    "nested_loop": [
      {
        "table": {
          "table_name": "C",
          "access_type": "ref",
          "possible_keys": [
            "parent"
          ],
          "key": "parent",
          "used_key_parts": [
            "parent_id"
          ],
          "key_length": "3",
          "ref": [
            "const"
          ],
          "rows_examined_per_scan": 12,
          "rows_produced_per_join": 1,
          "filtered": "10.00",
          "cost_info": {
            "read_cost": "7.43",
            "eval_cost": "0.12",
            "prefix_cost": "8.63",
            "data_read_per_join": "13K"
          },
          "used_columns": [
            "category_id",
            "parent_id",
            "status",
            "services"
          ],
          "attached_condition": "(`dev2`.`C`.`status` = 'A')"
        }
      },
      {
        "table": {
          "table_name": "CD",
          "access_type": "ref",
          "possible_keys": [
            "PRIMARY"
          ],
          "key": "PRIMARY",
          "used_key_parts": [
            "category_id"
          ],
          "key_length": "3",
          "ref": [
            "dev2.C.category_id"
          ],
          "rows_examined_per_scan": 1,
          "rows_produced_per_join": 1,
          "filtered": "100.00",
          "cost_info": {
            "read_cost": "0.30",
            "eval_cost": "0.12",
            "prefix_cost": "9.05",
            "data_read_per_join": "5K"
          },
          "used_columns": [
            "category_id",
            "category",
            "products_count",
            "icon",
            "counts"
          ]
        }
      }
    ]
  }
}