This claim is considered to be true.
CNN https://www.cnn.com/world/europe/timeline-louvre-robbery-intl-latam-vis
BBC https://www.bbc.com/news/articles/cg7nrlkg0zxo
According to CNN and the BBC, the perpetrator arrived at the Louvre Museum at 9:30 AM using a vehicle-mounted mechanical lift, then stole the jewels, and fled at 9:38 AM on two prepared scooters. Therefore, it could be said that the robbery took about 7-8 minutes.
However, the same articles state that the actual time spent inside the museum was 4 minutes. At 9:34, the thieves got their hands on the jewels. Due to differing definitions of what constitutes the duration of the robbery, it is conceivable that some individuals would argue the time was 4 minutes, not 7.
ABC https://abcnews.go.com/US/paris-prosecutor-deeply-regrets-disclosing-arrests-louvre-jewel/story?id=126907943
Incidentally, this article was published 8 hours ago and is the ABC News piece used for this fact-check topic. Even within this article, it states that the time taken for the robbery was 7 minutes.