Ask HN: How to manage focus in a stop and go workflow

I work with data, and my typical workflow involves cycles of high focus(e.g. writing data extract SQL code)for ~15 minutes and low focus (e.g. waiting the extract to return data) for ~5 minutes. I repeat the cycle continuously. Lately, it takes more mental overhead to come back to high focus mode because my mind wonders too far during low focus mode. Does anyone share this situation and was able to overcome? Kindly share your experience. I am open to workflow adjustment as well.