SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2bc6df2aa8cf97ce075325e83babefb96bf7d9034aea457b5d55c4d8feb00abc' 
  AND token = 'ACFtDYO5CEGnXjZY9kbrT+tYPZXgZ83FkLsHtBxCa3E=' 
  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