SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f654036f23d4de55e9882b68b297fbc17f31ed718440a4e352161cd86b0c361' 
  AND token = '1JNUuEN8WLaB98QhsasY3pVFQ5FE2F/8DWkIYBx3RTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

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