SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb1e564358f861da07c0bf7e3a6c2cea8471746c6ca428fb33f1c7a4ab4794a9' 
  AND token = 'D2zJaKrCWGwGTS7LEVwz859yxKGwFqHkOe+PSFwMjpw=' 
  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