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 (
    94582, 94853, 95756, 95758, 95770, 95771, 
    95772, 95774, 95775, 95776, 95824, 
    95825, 95826, 96573, 97608, 97610, 
    97611, 97612, 97613, 97614, 97615, 
    97617, 97618, 97629, 97630, 97631, 
    97633, 97635, 97636, 97637, 97640, 
    97641, 97642, 97643, 97644, 97645, 
    97646, 97647, 97648, 97649, 97650, 
    97651, 97652, 97653, 97654, 97655, 
    97656, 97657, 97658, 97659, 97660, 
    97661, 97662, 97663, 97664, 97665, 
    97666, 97667, 97668, 97669, 97670, 
    97671, 97672, 97673, 97674, 97675, 
    97676, 97677, 97678, 97679, 97680, 
    97681, 97697, 97699, 97700, 97701, 
    97702, 97706, 99112, 99115, 99116, 
    99118, 99119, 99130, 99132, 99134, 
    99143, 99164, 99166, 99173, 99175, 
    99180, 99192, 99194, 99197, 99200
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00071

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 (94582,94853,95756,95758,95770,95771,95772,95774,95775,95776,95824,95825,95826,96573,97608,97610,97611,97612,97613,97614,97615,97617,97618,97629,97630,97631,97633,97635,97636,97637,97640,97641,97642,97643,97644,97645,97646,97647,97648,97649,97650,97651,97652,97653,97654,97655,97656,97657,97658,97659,97660,97661,97662,97663,97664,97665,97666,97667,97668,97669,97670,97671,97672,97673,97674,97675,97676,97677,97678,97679,97680,97681,97697,97699,97700,97701,97702,97706,99112,99115,99116,99118,99119,99130,99132,99134,99143,99164,99166,99173,99175,99180,99192,99194,99197,99200)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}