Will those humble bundle games will expire soon ?

If you purchased them yourself, in the purchase page there will be a note under the key saying if any of the keys has a redemption date limit.

This War of Mine from the Ukraine bundle does not have an expiration date.

I have in HB, purchased by me:
2 copies of Armello
2 copies of This War of Mine and 1 of TWoM Final cut
1 copy of Jackbox Party Pack 4
3 copies of Overlord II
1 copy of Overgrowth

None of those have any redeem date limit.

Now you only need confirmation for FTL.