@Shubham Chougule Thanks for reaching out. You need to generate the token in each new request rather than hardcoding the already generated token. To get the token you need to call your API token endpoint leveraging the HTTP action. Once you receive the token from your API you can pass the newly generated token in your next actions of your workflow.
For your reference sharing this article where we are getting OAUTH token from the twitter API endpoint. In case if your workflow takes a lot of time before the token expires then I will suggest to make another HTTP call to your API token endpoint to get the new token/renewal call to renew the existing token so you can leverage the token in your next action of your workflow.