Physical tokens can be bought at supermarkets, convenience stores , or selected bank ATMs by choosing the "electricity token" option. 3. Business & Banking Security Tokens

For secure payment processing or banking authorization, you do not "buy" these in a traditional store but rather "order" or "provision" them: Manage your SecurID® token in Online Banking - Westpac

If you are looking for "payment tokens" in the context of digital assets (like Bitcoin, Ethereum, or Toncoin) that are used to pay for goods and services: