For an age and an age. The two aions are represented in the same verse, so you don’t have to look far on knowing how long this is:
And the devil that deceived them was cast into the lake of fire and brimstone, where are also the beast and the false prophet; and they shall be tormented [a] day and [a] night for [an aion] ever and [an aion] ever.
The beast and the false prophet are tormented for a day and a night, for an aion and an aion. It has never meant forever (infinity) but to give you an understanding there is a day followed by a night but we keep reading…
(Speaking of the New Day)
And I saw no temple therein: for the Lord God the Almighty, and the Lamb, are the temple thereof. And the city hath no need of the sun, neither of the moon, to shine upon it: for the glory of God did lighten it, and the lamp thereof is the Lamb.
And the nations shall walk amidst the light thereof: and the kings of the earth bring their glory into it. And the gates thereof shall in no wise be shut by day (for there shall be no more night): and they shall bring the glory and the honor of the nations into it.
So we are reading that the torment shall last a day and then a night, but then the NEW DAY arises and there is no more night and the gates of the New City will never be shut and those outside shall be brought into it.
So now we have a completely different understanding of what John is writing, it is not saying that torment shall last infinitely on and on, but for a short time only to be changed and brought into the Kingdom of God.
The hope of Christians isn’t in death (the night) but in the resurrection of the dead (the New Day).
Having [the same] hope in God which these themselves hold and look for, that there is to be a resurrection both of the righteous and the unrighteous (the just and the unjust).
1 Peter 1:2-4
Praised (honored, blessed) be the God and Father of our Lord Jesus Christ (the Messiah)! By His boundless mercy we have been born again to an ever-living hope through the resurrection of Jesus Christ from the dead, [Born anew] into an inheritance which is beyond the reach of change and decay [imperishable], unsullied and unfading, reserved in heaven for you.
Even the unjust will be made new in this hope and they too will be born anew into an inheritance which is beyond the reach of change and decay and reserved in heaven for them too.