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The formal restriction on visiting the USA after having visited Iran applies only to the Visa Waiver Program. Persons who have traveled to Iran are still able to get a US visa, and in fact are required to if they would otherwise have been eligible for the VWP.
Citizens of India are not eligible for the VWP and require a visa in any case. Therefore, the formal restriction against retaining VWP eligibility after having visited Iran does not apply to you. You can still get a US visa. You may, however, have a difficult time in the visa interview, but the US official will not necessarily deny you a US visa for having visited Iran. The fact of your Iran visit will simply be one piece of data that the official may or may not consider relevant.