Transaction stuck, when does it timeout?

I'd tried to use ForkDelta to swap some LGO coins from my wallet to the trading wallet, but metamask somehow applied automatically a much lower gas value than what needs to be used right now. This transaction has been stuck for about 5 hours now, which is surprising because i thought the timeout was 3 hours.

I would rebroadcast it with a higher gwei, but things are crazy right now so all I want is to either get the transaction to complete or get canceled via timout – how can i check how long this will take?