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.meta_keywords, 
  cscart_product_descriptions.meta_description, 
  cscart_product_descriptions.search_words, 
  cscart_product_descriptions.promo_text 
FROM 
  cscart_product_descriptions 
WHERE 
  cscart_product_descriptions.product_id IN (
    87389, 87388, 87387, 87385, 87383, 87382, 
    87381, 87380, 87379, 87378, 87377, 
    87376, 87375, 87374, 87373, 87372, 
    87109, 87108, 87107, 87106
  ) 
  AND cscart_product_descriptions.lang_code = 'en'

Query time 0.00033

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE cscart_product_descriptions range PRIMARY,product_id PRIMARY 9 20 Using where

Result

product_id short_description full_description meta_keywords meta_description search_words promo_text
87106 LWHDB13,LW Recordings,Seb Storm
87107 LWHDB13,LW Recordings,DJ Sunkeeperz
87108 LWHDB13,LW Recordings,K-Rai,Kenny99
87109 LWHDB13,LW Recordings,Dr House
87372 HUS002,Traffic Records,BK
87373 HUS002,Traffic Records,Ben Keen
87374 HUS002,Traffic Records,BK
87375 HUS002,Traffic Records,BUDDY XL
87376 HUS002,Traffic Records,Casella
87377 HUS002,Traffic Records,Diablik,Oyaebu
87378 HUS002,Traffic Records,DJ Generator
87379 HUS002,Traffic Records,Energy Syndicate
87380 HUS002,Traffic Records,Fullerlove
87381 HUS002,Traffic Records,Future Disciple
87382 HUS002,Traffic Records,George Kirby
87383 HUS002,Traffic Records,Halestone
87385 HDB009,Riot Recordings,George Kirby
87387 HDB009,Riot Recordings,Anne Savage,Scott Attrill
87388 HDB009,Riot Recordings,Scott Attrill
87389 HDB009,Riot Recordings,Scott Attrill