UserDataMap.php

public function findByHash($userId,$securityHash){

		$this->findByHashMemoryStatement->bindValue(':id',$userId);
		$this->findByHashMemoryStatement->bindValue(':securityHash',$securityHash);
		$this->findByHashMemoryStatement->execute();

		$userIdMemory = $this->findByHashMemoryStatement->fetch(\PDO::FETCH_COLUMN);

		if ($userIdMemory){
			//Сначала проверяем существует ли hash пользователя в кэше (mysql memory)
			return $userIdMemory;
		}else{
			//Смотрим в основной таблице юзверей
			$this->findByHashStatement->bindValue(':id',$userId);
			$this->findByHashStatement->bindValue(':securityHash',$securityHash);
			$this->findByHashStatement->execute();

			$userId = $this->findByHashStatement->fetch(\PDO::FETCH_COLUMN);

			if ($userId){
				$stmt = $this->getPDO()->prepare('delete from pn_users_auth where id = ?');
				$stmt->bindValue(1,$userId,\PDO::PARAM_INT);
				$stmt->execute();

				$stmt = $this->getPDO()->prepare('insert into pn_users_auth set id = ?, securityHash = ?');
				$stmt->bindValue(1,$userId,\PDO::PARAM_INT);
				$stmt->bindValue(2,$securityHash,\PDO::PARAM_STR);
				$stmt->execute();

				return $userId;
			}else{
				return null;
			}
		}
	}