You don’t need an Indian court to validate or confirm your foreign divorce. It is not ordinarily required.
As per Indian private international law, your divorce is valid in India. This is because it is a foreign divorce decree obtained by mutual consent. Indian law recognises such divorces even though the foreign court is not a court setup under the applicable law (Special Marriage Act in your case).
Ordinarily, parties don’t go to Indian courts in such situations unless their ex-wife or ex-husband questions the foreign divorce (say by bringing a maintenance proceeding or filing a bigamy complaint in India).
You have two options. The first one — which is what you should do in my opinion — is to simply move on. You are free to remarry under this option. If remarrying you will have to present the marriage officer with a copy of your foreign divorce decree. In case they object ( they ordinarily do not) you will have to file a writ petition before the local High Court to direct said marriage officer to accept your foreign divorce. The court is bound to side with you as per S. 13 CPC and its interpretation in matrimonial matters by the Supreme Court of India.
Second option is for you to file a suit for validating your foreign divorce decree in India. This could be time consuming if you ex-wife doesn’t appear. If she does not appear the court will wait for sometime before proceeding ex parte (in her absence).
Hope that answers your question.