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 (
    91513, 86177, 86200, 86501, 86777, 86178, 
    86201, 86502, 86778, 82633, 82634, 
    83530, 83531, 85316, 85413, 85464, 
    85515, 86973, 87034, 89820, 89872, 
    89944, 91510, 82851, 82924, 82997, 
    83513, 83521, 85362, 83559, 83560, 
    83561, 83562, 89770, 89771, 84814, 
    84815, 84832, 84833, 84844, 84845, 
    91137, 91223, 91278, 83053, 83055, 
    83602, 83604, 90889, 90891, 90968, 
    90970, 82631, 83528, 83050, 83595, 
    90886, 90965, 84820, 84821, 91168, 
    89768, 83051, 83600, 90887, 90966, 
    89821, 89873, 89945, 91511, 87306, 
    87307, 87318, 87319, 87330, 87331, 
    87342, 87343, 85063, 85149, 85195, 
    85241, 83564, 83565, 85060, 85146, 
    85192, 85238, 86134, 86136, 86157, 
    86159, 86642, 86644, 86711, 86713
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00155

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 (91513,86177,86200,86501,86777,86178,86201,86502,86778,82633,82634,83530,83531,85316,85413,85464,85515,86973,87034,89820,89872,89944,91510,82851,82924,82997,83513,83521,85362,83559,83560,83561,83562,89770,89771,84814,84815,84832,84833,84844,84845,91137,91223,91278,83053,83055,83602,83604,90889,90891,90968,90970,82631,83528,83050,83595,90886,90965,84820,84821,91168,89768,83051,83600,90887,90966,89821,89873,89945,91511,87306,87307,87318,87319,87330,87331,87342,87343,85063,85149,85195,85241,83564,83565,85060,85146,85192,85238,86134,86136,86157,86159,86642,86644,86711,86713)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}