Arguments#
The key of the hash.
The field or fields to set an expiration time for.
The time-to-live (TTL) in seconds.
Optional condition for setting the expiration:
NX: Set the expiration only if the field does not already have an expiration.XX: Set the expiration only if the field already has an expiration.GT: Set the expiration only if the new TTL is greater than the current TTL.LT: Set the expiration only if the new TTL is less than the current TTL.