I am not with Laminar Research; just a flight simmer.
The dvd version of x-plane is setup so that you have to have disc 1 in a dvd drive to run at all times. The alternative is to purchase a specific USB dongle that substitutes for disc 1. There is no password "key" used.
If you have a problem with a particular disc you should contact the reseller or developer of the dvd version of x-plane. If your DVD version is a genuine x-plane version ie not steam or from aerosoft or any other brand then make initial contact with Laminar Research at firstname.lastname@example.org
My recollection from previous questions and answers in this forum on the same subject the short answer to your question is no.