warning: /var/cache/yum/x86_64/7/mysql57-community/packages/mysql-community-client-5.7.40-1.el7.x86_64.rpm: Header V4 RSA/SHA256 Signature, key ID 3a79bd29: NOKEY
Retrieving key from file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

The GPG keys listed for the “MySQL 5.7 Community Server” repository are already installed but they are not correct for this package.
Check that the correct key URLs are configured for this repository.

Failing package is: mysql-community-client-5.7.40-1.el7.x86_64
GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

yum install mysql-community-server

Solution: You need to disable the GPG verification check
yum -y install mysql-community-server –nogpgcheck

======================================
Error when installing MySQL: Failing package is: mysql-community-client-5.7.40-1.el7.x86_64 GPG Keys are configured as

1. Error reporting
Failing package is: mysql-community-client-5.7.40-1.el7.x86_64 GPG Keys are configured as: file:///etc/pki/rpm-gpg/RPM-GPG-KEY-mysql

2. Source:
Install MySQL to execute
When yum -y install mysql-community-server, the installation is not successful

3.The reason for the error
MySQL GPG key has expired

4.The solution
implement
rpm –import https://repo.mysql.com/RPM-GPG-KEY-mysql-2022

execute after execute
yum -y install mysql-community-server

Successful installation