How to limit the selection from the database in Yii2 in the model?

Question

MySQL

I know how to make selections in MySQL, but I don’t understand where to write all this in Yii2.
For example, there is a company table and a status field. Values ​​open, closed. The model is generated using Gii. Where should I write "..Where status = "closed"" in the model so that only companies with the closed status are displayed in r=company/index?