SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '149170ece5339961843eeb9f8fc177acc249b2d863c2a83c32b9e60353c122a6' 
  AND token = 'Hw5BccZiSIg/oB9QcER8Aoivjmytk4h43hy2aWXAfXg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

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