Checks a token's time window (RFC 9767 section 2.1.7): exp exclusive, nbf inclusive, no clock skew.
exp
nbf
the expiry, in seconds
the not-before, in seconds
the current time, in seconds
a refusal, or null when the token is in its window
Checks a token's time window (RFC 9767 section 2.1.7):
expexclusive,nbfinclusive, no clock skew.