问3次尝试后MySQL超级慢查询

EN

      sql.query(`SELECT * FROM WMembers where DiscordID = ${message.author.id}`, (err, rows) => {
        if(err) console.log(err)

        if(!rows[0]) return message.channel.send("The user has no XP!")
        let xp = rows[0].XP
        let level = rows[0].Level
        let nextLevel = level * 40
      message.channel.send(**Level: **${level - 1}\n**Points: **${xp} / ${nextLevel}`)
      })

const pool = mysql.createPool({
    host    : keys.dbHost,
    port    : 3306,
    user    : keys.dbUser,
    password: keys.dbPass,
    database: keys.dbName
});

let sql = {};
sql.query = function(query, params, callback) {
  pool.getConnection(function(err, connection) {
    if(err) { 
      if (callback) callback(err, null, null); 
      return; 
    }

    connection.query(query, params, function(error, results, fields) {
      connection.release();
      if(error) { 
        if (callback) callback(error, null, null); 
        return; 
      }
      if (callback) callback(false, results, fields);
    });
  });
};