The absolute expiry time in milliseconds since the unix epoch.
While cached records may be evicted earlier, they will
never remain beyond the supplied expires_at.Note: This value should not be supplied if a value was also
provided for ttl. If both options are supplied, the
earlier expiry of the two will be used.
Optional.
The time-to-live value of this cache entry in milliseconds.
While cached values may be evicted earlier, they will
never remain beyond the supplied ttl.Note: This value should not be supplied if a value was also
provided for expires_at. If both options are supplied, the
earlier expiry of the two will be used.
Optional.