SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f90510322d915c42f3db293caf6a770469ae743480fbe3f55d74f5589c0180de' 
  AND token = 'Be6Rv39Ft8TyYtTO+CvkV4Ol0A4abJqEudBTUFpxF/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

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