Modification of http://blog.teamgeist-medien.de/2017/08/1703.html

GetRecordViewHelper.php

<?php
  namespace TGM\TgmLib\ViewHelpers;

  use TYPO3\CMS\Backend\Utility\BackendUtility;
  use TYPO3Fluid\Fluid\Core\Rendering\RenderingContextInterface;
  use TYPO3Fluid\Fluid\Core\ViewHelper\AbstractViewHelper;
  use TYPO3Fluid\Fluid\Core\ViewHelper\Traits\CompileWithRenderStatic;

  /**
   * GetRecordViewHelper
   * Fetches a raw record from table=$table and uid=$uid.
   * This ViewHelper returns the record if:
   *  - the table exist,
   *  - the uid exist and
   *  - the record was was not deleted (deleted = 0).
   * Otherwise it'll return false.
   */
  class GetRecordViewHelper extends AbstractViewHelper
  {

    use CompileWithRenderStatic;

    /**
     * @var boolean
     */
    protected $escapeOutput = false;

    /**
     * @return void
     */
    public function initializeArguments()
    {
      parent::initializeArguments();

      $this->registerArgument('table', 'string', 'The table of the record.', false, 'tt_content');
      $this->registerArgument('uid', 'int', 'The uid of the record.', true);
      $this->registerArgument('as', 'string', 'The name of the variable.', false, 'record');
    }

    /**
     * @param array                     $arguments
     * @param \Closure                  $renderChildrenClosure
     * @param RenderingContextInterface $renderingContext
     *
     * @return mixed
     */
    public static function renderStatic(array $arguments, \Closure $renderChildrenClosure, RenderingContextInterface $renderingContext)
    {
      $record = BackendUtility::getRecord($arguments['table'], $arguments['uid']);
      
      $templateVariableContainer = $renderingContext->getVariableProvider();
      $templateVariableContainer->add($arguments['as'], $record);
      $output = $renderChildrenClosure();
      $templateVariableContainer->remove($arguments['as']);

      return $output;
    }
  }

Usage:

<tmgLib:getRecord uid="123" table="tt_content">
Title: {record.title}
</tmbLib>