I agree there is nothing to coerce out of you anymore and so you'd not be held on this forced decryption law... but not complying with such a court order probably results in another offence for which you can then get punished (not sure if a fine, community service, or jail time would be most likely for this), on top of that it doesn't look good to the judge who presides over the original case in which they de demanded the decryption in the first place