All the terminals at MAD seem to have a fast track security, which can be accessed with a STE+ BP, assuming a ST flight leaving from that terminal of course. And if flying UX, there is of course Sky Priority at check in. Which is really, really valuable because most all the people flying UX are not elite. There was a huge line at 6:45am to check in, but no one standing at the business class Sky Priority line.

BIO however, has no fast track of any kind.