SELECT 
  category_id, 
  parent_id 
FROM 
  cscart_categories 
WHERE 
  parent_id IN(
    719, 718, 414, 721, 415, 720, 722, 756, 
    413, 276, 416
  ) 
  AND category_id != 264

Query time 0.00036

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "15.07"
    },
    "table": {
      "table_name": "cscart_categories",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "parent",
        "p_category_id"
      ],
      "key": "parent",
      "used_key_parts": [
        "parent_id",
        "category_id"
      ],
      "key_length": "6",
      "rows_examined_per_scan": 74,
      "rows_produced_per_join": 74,
      "filtered": "100.00",
      "using_index": true,
      "cost_info": {
        "read_cost": "7.67",
        "eval_cost": "7.40",
        "prefix_cost": "15.07",
        "data_read_per_join": "193K"
      },
      "used_columns": [
        "category_id",
        "parent_id"
      ],
      "attached_condition": "((`aomnia_com`.`cscart_categories`.`parent_id` in (719,718,414,721,415,720,722,756,413,276,416)) and (`aomnia_com`.`cscart_categories`.`category_id` <> 264))"
    }
  }
}