one minute 能引导时间状语从句?

本人认为这是一个完整的句子,并不是从句。one moment作状语。可以理解成at the moment。因为这是诗句,所以翻译需要根据意境翻译。

One minute I held the key

Next the walls were closed on me

And I discovered that my castles stand

Upon pillars of salt and pillars of sand

此刻我手握权位经脉

转瞬才知宫墙深似海

恍然发现我的城池

基底散如盐沙乱似尘埃