No, Keys to the Kingdom is a Magic Kingdom only tour.
Backstage Magic is a 7-hr, 3-park tour that takes you behind the scenes at a number of different attractions and includes tours of different costume/wardrobe areas, audio-animatronics workshops, parade staging/storage, and other "making the magic happen" areas.
It ends at MK and back when I took it (2000), they not only took you in the utilidors (an experience in and of itself), they took you into the computer control room. One of the best parts of the tour came as we approached the control room, in fact. The Keys tour group was standing at the door to that area and the CM was telling them about how few people are allowed in. It made for some interesting faces when our guide escorted us past them and through the door.
I think I read they don't go in the computer room anymore, but in doing a quick google search, it's hard to find updated info about the tour.
It does include lunch for the tour group - it used to be family-style service at Mama Melrose, but that might have changed too.
It is truly amazing - my husband still talks about how it changed the way he looked at Disney, and we often scheme

ways that we can take it again. (harder now that we have a child, as you know)