Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5eb54cba6231011d996ece6371e213cfc9603e5298a26f68644092f66d232d90' 
  AND token = 'ahkdUHTYjE7AY23mK3b+YWP8QIrT3upo3QnvWANJgq4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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