Before any lounge question about Kalaleh Airport (KLM) gets an answer, a bigger fact needs to be on the table: several governments currently advise against all but essential travel to Iran, pointing to detention risk, limited consular access, and ongoing regional tension, and none of that changes based on what a small provincial airfield in Golestan province might or might not offer. Check your own government's present-day guidance on Iran first, and treat it as a genuine input into your plans rather than a footnote.
Kalaleh is a town in Golestan province in Iran's north, and whatever airfield serves it operates at the scale of that smaller provincial community rather than as anything close to a national hub. Gorgan Airport, serving the provincial capital nearby, is the closer larger facility, and it too remains a modest regional field without a developed lounge culture of its own. Iran's genuine international lounge infrastructure, to the extent it exists, is concentrated at Tehran's Imam Khomeini International Airport, the country's main gateway, a considerable distance and an entirely different category from a small airfield like Kalaleh's.
Set against the current advisory picture, lounge amenities anywhere near Kalaleh are a minor detail next to the more basic questions of whether this trip makes sense at all and what genuine on-the-ground support would look like if it goes ahead. A provincial airfield in northern Iran was never going to carry business-lounge infrastructure in the first place, advisory context or not, so treating lounge access as the main question here misses what actually matters.
If circumstances make travel to this part of Golestan unavoidable, put your effort into your government's specific current advisory language for Iran, confirmed local support arrangements, and verified transport between Kalaleh and Gorgan, rather than into lounge research that a field this size was never going to reward, advisory or no advisory.