SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82189177a20ccae33c54fd94cb9a8f8fb72e1285ab8332e1ba2c7d42796b549e' 
  AND token = 'A8Z8Q/ghnQEi2O6CgGAbFhEiFeDjn/KyBLpz1GeuFOA=' 
  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