TTL

Redix.TTL(key, callback)

Redix.TTL('session:abc', function(err, ttl)
    if not err then
        if ttl == -2 then
            print('Key does not exist')
        elseif ttl == -1 then
            print('Key has no expiration')
        else
            print('Key expires in ' .. ttl .. ' seconds')
        end
    end
end)