Can ENS claim transaction sit in mempool or will the claim fail ultimately if it takes too long because of low gas fee set?

I want to submit a claim transaction for ENS tokens and use a low gas fee like 25 gwei. I know with DEX transactions if it sits too long in mempool you'll the gas because 2nd and 3rd transactions that occur after the 1st don't happen in enough time.

My question is, how does the claim process work? Is it a single transaction and once submitted it doesn't matter how long it takes to get mined? If so, is it safe to submit with low gas and not care if it takes a couple days, etc...

I know also we have until May to claim ENS to of course I would make sure it gets mined by then.