Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84de2ed7be6db6414f6da50416f4ef2fc3362ce243ba9677f0ff37e561695d4e' 
  AND token = 'qvOJxOn6v/f9RgE7iIzHGiSwB9k3ml5TIcVp0pTJiIQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}