Rsa97

$array = [
  [
    "gq_address" => "188.120.254.140",
    "gq_hostname" => "•   RGPlay | DarkRP [Быстрая загрузка]",
    "gq_maxplayers" => 128,
    "gq_numplayers" => 0,
    "gq_online" => true,
    "gq_port_client" => 27015,
  ], [
    "gq_address" => "62.109.18.242",
    "gq_hostname" => "Default Breach Server",
    "gq_maxplayers" => 128,
    "gq_numplayers" => 0,
    "gq_online" => true,
    "gq_port_client" => 27015,
  ]
];
$array = array_map(function($el) {
  return [
    'gq_hostname' => $el['gq_hostname'],
    'gq_address' => $el['gq_address'],
    'gq_port_client' => $el['gq_port_client'],
    'gq_online' => $el['gq_online'],
    'gq_numplayers' => $el['gq_numplayers'],
    'gq_maxplayers' => $el['gq_maxplayers']
  ];
}, $array);
var_dump($array);

array(2) {
  [0] => array(6) {
    ["gq_hostname"] => string(55) "•   RGPlay | DarkRP [Быстрая загрузка]"
    ["gq_address"] => string(15) "188.120.254.140"
    ["gq_port_client"] => int(27015)
    ["gq_online"] => bool(true)
    ["gq_numplayers"] => int(0)
    ["gq_maxplayers"] => int(128)
  }
  [1] => array(6) {
    ["gq_hostname"] => string(21) "Default Breach Server"
    ["gq_address"] => string(13) "62.109.18.242"
    ["gq_port_client"] => int(27015)
    ["gq_online"] => bool(true)
    ["gq_numplayers"] => int(0)
    ["gq_maxplayers"] => int(128)
  }
}

SELECT `k`.*
  FROM (
    SELECT `serial`, MAX(`event_date_time`) AS `event_date_time`
      FROM `keys`
      GROUP BY `serial`
  ) AS `d`
  JOIN `keys` AS `k`
    ON `k`.`serial` = `d`.`serial` AND `k`.`event_date_time` = `d`.`event_date_time`

SELECT ...
  FROM `orders`
  WHERE `id` NOT IN (
    SELECT `order_id`
    FROM `order_items` 
    WHERE `item_id` IN (
      SELECT `id`
      FROM `items`
      WHERE `name` LIKE '%красн%'
    )
  )

$$
DELIMITER ;