WOW Token, an item in World of Warcraft, is a way Blizzard officially sells gold, you can say. There are so many third party wow gold sellers and after so many years, Blizzard seems they didn't do much to them though selling gold for real money violates the rules. Partially because gold sellers encourages the game economy and helps the game grow bigger. Now that Blizzard couldn't let the gold sellers earn all the money, they started to sell gold too by introducing the new item WOW Token.
As is always, gold sellers started to promote their business months before WOW classic launched. Will there be WOW Token too? Seems no.
At first, WOW classic is nostalgious, while WOW Token came out first in 2015, not related to anything about nostalgia. After all, the latest 2 expansions of WOW have lost many subscribers and WOW classic is what can take them back. Blizzard won't do anything that will defame it again.
Secondly, most players don't really want it. They think it kinda ruins the game economy.
Probably those players who want WOW token back is those who'd like to buy gold wow classic. This is easy. There are many reliable gold selling sites on the market. It is rather safe. Take ssegold.com for example, place an order just requires your character name, they will mail the gold to you. You can pay with Paypal. The whole process is super easy.