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, 
  cscart_product_descriptions.unit_name 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    25271, 25272, 25273, 25274, 25275, 25276, 
    25277, 25278, 25279, 25280, 25281, 
    25282, 25283, 25284, 25285, 25286
  ) 
  AND cscart_product_descriptions.lang_code = 'ru'

Query time 0.01006

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_product_descriptions",
      "access_type": "range",
      "possible_keys": ["PRIMARY", "product_id", "idx_product_lang"],
      "key": "PRIMARY",
      "key_length": "9",
      "used_key_parts": ["product_id", "lang_code"],
      "rows": 16,
      "filtered": 100,
      "index_condition": "cscart_product_descriptions.product_id in (25271,25272,25273,25274,25275,25276,25277,25278,25279,25280,25281,25282,25283,25284,25285,25286) and cscart_product_descriptions.lang_code = 'ru'"
    }
  }
}

Result

product_id short_description full_description unit_name
25271 Tube assembly - center, 2<p>Part number 366T11XCA1</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25272 motor-clutch<p>Part number 4148018FA0</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25273 mass damper<p>Part number 365931XCC0</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25274 Shift-by-wire control unit<p>Part number 4295118170</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25275 Bracket-shift by wire control unit<p>Part number 4295218230</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25276 Motor-gear drive unit assembly, front<p>Part number 4400018JC0</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25277 Motor-gear drive unit assembly, rear<p>Part number 4400018JD0</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25278 bolt-eye<p>Part number 452673B000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25279 Seal-Oil<p>Part number 459513B000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25280 Plug-Magnet<p>Part number 0081017121</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25281 BOLT<p>Part number 1127708256B</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25282 battery assembly<p>Part number 37110F9620</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25283 Battery-Built-in Cam<p>Part number 37120CU220</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25284 Tray Assembly-Battery<p>Part number 37150GI000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25285 Clamp-Battery<p>Part number 37160KL000</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>
25286 Sensor Assembly-Battery<p>Part number 37180GI010</p><p>If you are not sure about compatibility, please contact us in advance to confirm the part number.</p>