SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c65070169be384ccf72d026101b703ca90215f818a1b1f3f56df55b2a33952b' 
  AND token = 'rPzH8MRNuOC68IGRNCM6+idCtPMfkQaVgqADk+erDkw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE Impossible WHERE noticed after reading const tables