SELECT 
  cscart_product_descriptions.product_id, 
  cscart_product_descriptions.short_description, 
  IF(
    cscart_product_descriptions.short_description = '' 
    OR cscart_product_descriptions.short_description IS NULL, 
    cscart_product_descriptions.full_description, 
    ''
  ) AS full_description, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    2574, 247, 2478, 908, 2527, 2490, 2372, 
    8483, 2509, 2892, 2896, 2471, 2576, 
    2902, 2395, 2620, 2359, 2340, 2502, 
    2473, 2508, 2565, 2906, 2580, 2638, 
    2550, 2275, 2363, 2599, 2399, 2352, 
    2503, 2602, 2459, 2339, 2360, 2572, 
    2253, 2540, 2107
  ) 
  AND cscart_product_descriptions.lang_code = 'ar'

Query time 0.00107

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "28.33"
    },
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "product_id"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id",
        "lang_code"
      ],
      "key_length": "9",
      "rows_examined_per_scan": 40,
      "rows_produced_per_join": 40,
      "filtered": "100.00",
      "index_condition": "((`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_descriptions`.`product_id` in (2574,247,2478,908,2527,2490,2372,8483,2509,2892,2896,2471,2576,2902,2395,2620,2359,2340,2502,2473,2508,2565,2906,2580,2638,2550,2275,2363,2599,2399,2352,2503,2602,2459,2339,2360,2572,2253,2540,2107)) and (`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_descriptions`.`lang_code` = 'ar'))",
      "cost_info": {
        "read_cost": "24.33",
        "eval_cost": "4.00",
        "prefix_cost": "28.33",
        "data_read_per_join": "182K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description",
        "unit_name"
      ]
    }
  }
}