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 (
    2282, 2285, 2904, 2900, 2909, 2887, 2890, 
    2888, 2886, 8380, 7741, 10237, 10140, 
    10197, 10020, 10299, 8379, 10167, 10344, 
    10032, 10177, 10178, 10345, 8439, 10249, 
    10222, 10035, 10147, 10172, 10048, 
    10193, 10276, 10039, 10095, 10228, 
    10192, 10058, 8345, 10239, 10148, 10156, 
    10023, 10103, 10026, 10074, 10088, 
    10174, 10233, 10226, 10219, 10244, 
    10105, 10157, 10160, 10059, 9972, 10274, 
    10294, 10022, 10104, 10247, 10261, 
    9952, 10159, 10161, 10225, 10254, 10255, 
    10273, 9937, 9968, 10071, 10272, 9969, 
    10047, 10050, 10056, 10093, 10232, 
    10238
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00195

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "56.65"
    },
    "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": 80,
      "rows_produced_per_join": 80,
      "filtered": "100.00",
      "index_condition": "((`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_descriptions`.`product_id` in (2282,2285,2904,2900,2909,2887,2890,2888,2886,8380,7741,10237,10140,10197,10020,10299,8379,10167,10344,10032,10177,10178,10345,8439,10249,10222,10035,10147,10172,10048,10193,10276,10039,10095,10228,10192,10058,8345,10239,10148,10156,10023,10103,10026,10074,10088,10174,10233,10226,10219,10244,10105,10157,10160,10059,9972,10274,10294,10022,10104,10247,10261,9952,10159,10161,10225,10254,10255,10273,9937,9968,10071,10272,9969,10047,10050,10056,10093,10232,10238)) and (`softwarepirmam_hewadelivard_cscart_4`.`cscart_product_descriptions`.`lang_code` = 'en'))",
      "cost_info": {
        "read_cost": "48.65",
        "eval_cost": "8.00",
        "prefix_cost": "56.65",
        "data_read_per_join": "365K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description",
        "unit_name"
      ]
    }
  }
}