Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '28b721d68b0b6fb892c6b0e057b8227a60d99f18eae6fc6d249a5dcb9a6bf2c8' 
  AND token = 'BzD8HFmZvg4VZKzR+ENnDAxR0R3urIBSSnkNzDx+xFg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}