how to set specific cookiet expiration date in Sinatra

Question

Using sinatra/cookies, in an API, I can set the expiration date for all cookies of my application in the configuration:

set :cookie_options do
  {
    :secure => true,
    :expires => Time.new(2022,10,15)
  }
end

and then use it:

cookies[:__refresh_token__] = refresh_token

But I don't see how to set the expriration date only for this cookie, and not in the configuration for all cookies.