Its gone mate :)
I can tell you even without being on the Team :)
There is most likely a Timer for the Key to run out with in 48 hours after being given out
but aside from that you can take your sweet time to activate it
no need to hurry out of fear someone else could activate it before you :)
In the Shadow of the Black Cross. We Fullfill our Duty in your Name.
And Look forward to the Day we Return to your side Silvanos.
Watching over our Comrades as they Fullfill their Duty in your Name.