SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c627c2e70e77ccc0bb28c1b32fc652df8b8ab347a746daa1a46902cc7f5754f' 
  AND token = 'jvLUZFtHIZ1Gmsin8ddAHzKIXAK79/dYKtel4Ylm4vM=' 
  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