Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d9d0f2bac8de372f46d22650480fd94491b5dab755686ffb21e7a89a0ea4271' 
  AND token = 'elYfDte7o+31bI7cOgn4xsgYF43+MOqYFbIyFSISGuA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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