SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '044925e8b872c67053394e5bb287be3a7d110bc18762d4acaf7a8fe2c4d1267f' 
  AND token = 'rAr9Fz0U4zJOyhi6A4ss2yiwoIEkLcL4WjGg7NorGfw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

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