Your question identifies the range and different layers of meanings that words in the English language possess. You might like to think through the following process in future with such questions to help you answer them. Firstly, and most importantly, you must try to read the word in the context of its surrounding lines. Reading the stanza which contains the word, and the previous stanza and the one that comes after it, can often really help giving you the context of what the poet is talking about which can lead you to the definitino of the word itself. If you are still stuck, then you can turn to a dictionary to help you.
However, applying the first approach should help you here. Note the line which contains "token":
But the silence was unbroken, and the stillness gave no token...
The reference to the "silence" being "unbroken" and the "stillness" yielding no "token" would lead us to the conclusion that in this context "token" is used to refer to a noise.