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 (
    92652, 92653, 92654, 92655, 92656, 92657, 
    92658, 92659, 92660, 92661, 92662, 
    92663, 92664, 92665, 92672, 92673, 
    92674, 92675, 92676, 92677, 92678, 
    92679, 92680, 92681, 92682, 92683, 
    92684, 92685, 92686, 92687, 92688, 
    92695, 92696, 92697, 92698, 92699, 
    92700, 92701, 92702, 92703, 92704, 
    92705, 92706, 92707, 92708, 92709, 
    92710, 92711, 92712, 92713, 92714, 
    92715, 92716, 92717, 92718, 92719, 
    92720, 92721, 92722, 92723, 92724, 
    92725, 92726, 92727, 92728, 92729, 
    92730, 92731, 92732, 92733, 92734, 
    92741, 92742, 92743, 92744, 92745, 
    92746, 92747, 92748, 92749, 92750, 
    92751, 92752, 92753, 92754, 92755, 
    92756, 92757, 92758, 92759, 92760, 
    92761, 92762, 92763, 92764, 92765
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00141

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 (92652,92653,92654,92655,92656,92657,92658,92659,92660,92661,92662,92663,92664,92665,92672,92673,92674,92675,92676,92677,92678,92679,92680,92681,92682,92683,92684,92685,92686,92687,92688,92695,92696,92697,92698,92699,92700,92701,92702,92703,92704,92705,92706,92707,92708,92709,92710,92711,92712,92713,92714,92715,92716,92717,92718,92719,92720,92721,92722,92723,92724,92725,92726,92727,92728,92729,92730,92731,92732,92733,92734,92741,92742,92743,92744,92745,92746,92747,92748,92749,92750,92751,92752,92753,92754,92755,92756,92757,92758,92759,92760,92761,92762,92763,92764,92765)) and (`nuie_scalesta_net`.`cscart_product_descriptions`.`lang_code` = 'en'))"
    }
  }
}