SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5995a79ddd2ebaf1713c112a5608c29b1a856584e0c75187e14f7690d7095a0f' 
  AND token = 'OJwzvznYRUmYqeJg+bCWdE17GQQf6+aB/GtRWCO4k90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00013

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