SELECT 
  country 
FROM 
  cscart_country_descriptions 
WHERE 
  code = 'UA' 
  AND lang_code = 'en'

Query time 0.00037

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE cscart_country_descriptions const PRIMARY PRIMARY 12 const,const 1

Result

country
Ukraine