New Token and Identity expiration

Does the token and identity have an expiration time in which they must be used after creation?
If I get a new token today and sign a new identity in 2 days or in 2 months, does it work?
If I get a new token today, create and sign the identity, but not starting a new node for a few days, does it expire?

It will not expire unless you run it even once, in this case it will be disqualified for being offline too long.