Two short stanzas, and the first one gives us almost nothing but a scene: someone eating a sandwich for dinner in a car park. There is no table, no company, no real meal. The title, "Fast food," fits, but it also hints at something else, a life that has to be squeezed in and hurried through.
The second stanza turns that plain moment into something larger. The speaker says every day brings "a test / of how to live." That small word "test" is interesting. It suggests that even a lonely, makeshift dinner is a kind of question: how do you keep going, and keep some dignity or meaning, when things are rushed and bare?
The speaker doesn't complain or explain. The tone is quiet, tired and matter-of-fact, with a little resilience under it. Judging by the poem alone, we can't know why they're eating there, but the mood is one of solitude, and of facing ordinary life one day at a time.