SELECT 
  category_id, 
  ab__lc_catalog_image_control 
FROM 
  ushop_categories 
WHERE 
  category_id in (
    '318', '328', '329', '330', '331', '332', 
    '333', '334', '335', '325', '320', 
    '326', '319', '336', '323', '337', 
    '315', '338', '339', '324', '340', 
    '341', '321', '342', '317', '322', 
    '792', '316', '791', '343', '344', 
    '775', '345', '327', '346', '375', 
    '767', '768', '769', '770', '771', 
    '772', '773', '774'
  )

Query time 0.00495

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "30.81"
    },
    "table": {
      "table_name": "ushop_categories",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "p_category_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "category_id"
      ],
      "key_length": "3",
      "rows_examined_per_scan": 44,
      "rows_produced_per_join": 44,
      "filtered": "100.00",
      "index_condition": "(`marketplace`.`ushop_categories`.`category_id` in ('318','328','329','330','331','332','333','334','335','325','320','326','319','336','323','337','315','338','339','324','340','341','321','342','317','322','792','316','791','343','344','775','345','327','346','375','767','768','769','770','771','772','773','774'))",
      "cost_info": {
        "read_cost": "26.41",
        "eval_cost": "4.40",
        "prefix_cost": "30.81",
        "data_read_per_join": "143K"
      },
      "used_columns": [
        "category_id",
        "ab__lc_catalog_image_control"
      ]
    }
  }
}