SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00f465d1a8d95dfd3945e3dd60a6c22f05ad4f03af2d913471472fdfdfbba58c' 
  AND token = 'Udx1Uj3J+xnSBEfkFFEF9KKcW3uGNCKNgGli3lADIBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

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