SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bac1f61806856e10f06c0029bb08343eca51e59f34691566bc58d85b09711aa1' 
  AND token = 'e08BYtOmafI5n5UckFwofMXQ/lUiZJrKzNItIwmK5HU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

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