Ever since the server switch from Viacom to Jumpstart in September 2014, Keyquest has been taken down and not functional. Many people have complained on there facebook page that keyquest is not loading, keyquest is not working, keyquest is down, bring back keyquest, and etc.!
TNT has yet to give us a definite answer, other than they are working on it (they've also been "working" on the Lenny Conundrum, which has been down for close to two years)!
Is Keyquest closed forever? This is something that has yet to be announced, however, they did take off Keyquest from the drop-down list on the main site. Further, they really haven't been addressing the issue at all, so a permanent discontinuation may be possible. One thing is for sure though, they have bigger tasks at hand to resolve first, before looking into Keyquest.
Stay tuned!