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 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    97829, 97830, 97831, 97832, 97834, 97835, 
    97836, 97837, 97838, 97839, 97840, 
    97988, 97989, 97990, 97991, 97992, 
    97993, 98030, 98031, 98032, 98033, 
    98034, 98035, 98039, 98138, 98139, 
    98140, 98141, 98142, 98143, 98144, 
    98157, 98158, 98159, 98160, 98161, 
    98162, 98163, 98164, 98165, 98166, 
    98167, 98168, 98224, 98225, 98226, 
    98227, 98228, 98234, 98235, 98236, 
    98237, 98238, 98239, 98240, 98241, 
    98242, 98243, 98244, 98245, 98246, 
    98247, 98248, 98249, 98250, 98251, 
    98252, 98253, 98254, 98255, 98256, 
    98257, 98258, 98259, 98260, 98261, 
    98262, 98263, 98264, 98265, 98266, 
    98267, 98268, 98269, 98270, 98271, 
    98272, 98273, 98274, 98275, 98276, 
    98277, 98278, 98279, 98280, 98281
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00164

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "43.24"
    },
    "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": 96,
      "rows_produced_per_join": 96,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "33.64",
        "eval_cost": "9.60",
        "prefix_cost": "43.24",
        "data_read_per_join": "366K"
      },
      "used_columns": [
        "product_id",
        "lang_code",
        "short_description",
        "full_description"
      ],
      "attached_condition": "((`nuie_scalesta_net`.`cscart_product_descriptions`.`product_id` in (97829,97830,97831,97832,97834,97835,97836,97837,97838,97839,97840,97988,97989,97990,97991,97992,97993,98030,98031,98032,98033,98034,98035,98039,98138,98139,98140,98141,98142,98143,98144,98157,98158,98159,98160,98161,98162,98163,98164,98165,98166,98167,98168,98224,98225,98226,98227,98228,98234,98235,98236,98237,98238,98239,98240,98241,98242,98243,98244,98245,98246,98247,98248,98249,98250,98251,98252,98253,98254,98255,98256,98257,98258,98259,98260,98261,98262,98263,98264,98265,98266,98267,98268,98269,98270,98271,98272,98273,98274,98275,98276,98277,98278,98279,98280,98281)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}