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 (
    85657, 92212, 92213, 92214, 92215, 92217, 
    92223, 92465, 92466, 92191, 86388, 
    91350, 84100, 83093, 85549, 85550, 
    85565, 86221, 92228, 92229, 92230, 
    92231, 92237, 92469, 92470, 92471, 
    91348, 85585, 89180, 90074, 91892, 
    92150, 85653, 91361, 91363, 91391, 
    91393, 92197, 92457, 89727, 91362, 
    91364, 83096, 83098, 84102, 86385, 
    92240, 92245, 92247, 92248, 92249, 
    92250, 92252, 92253, 92485, 92486, 
    92487, 89738, 85578, 91392, 91394, 
    85655, 91359, 91389, 84104, 92010, 
    92098, 91360, 91357, 91387, 92241, 
    92242, 92243, 92244, 92246, 92251, 
    92483, 92484, 92440, 91358, 92186, 
    92187, 92188, 92189, 92190, 92441, 
    85652, 85656, 91390, 85582, 92488, 
    91388, 92476, 92477, 92478, 92479
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00245

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 (85657,92212,92213,92214,92215,92217,92223,92465,92466,92191,86388,91350,84100,83093,85549,85550,85565,86221,92228,92229,92230,92231,92237,92469,92470,92471,91348,85585,89180,90074,91892,92150,85653,91361,91363,91391,91393,92197,92457,89727,91362,91364,83096,83098,84102,86385,92240,92245,92247,92248,92249,92250,92252,92253,92485,92486,92487,89738,85578,91392,91394,85655,91359,91389,84104,92010,92098,91360,91357,91387,92241,92242,92243,92244,92246,92251,92483,92484,92440,91358,92186,92187,92188,92189,92190,92441,85652,85656,91390,85582,92488,91388,92476,92477,92478,92479)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}