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Here are some possible solutions for solving issues with connecting Airflow and MySQL in Docker Compose:

1. Check the Docker network: Ensure that both Airflow and MySQL are connected to the same Docker network.

2. Check the MySQL container name: Make sure that the MySQL container name used in the Airflow configuration matches the actual container name.

3. Check the MySQL credentials: Verify that the credentials used to connect to MySQL are correct, including the username, password, host, port, and database name.

4. Check the MySQL container health: Check if the MySQL container is healthy and running by entering its command line interface using docker exec -it <container_name> bash and then check the output of service mysql status.

5. Check the Airflow logs: Check the Airflow logs for any error messages related to the MySQL connection. You can use the command docker logs <airflow_container_name> to view the logs.

6. Enable debugging: Enable debugging for both Airflow and MySQL by setting the debug=True option in their configuration files. This will provide more detailed error messages.

7. Try using a different database: If all else fails, try using a different database such as SQLite or PostgreSQL to see if the issue is with MySQL specifically.