Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a10fa5d8a3f925b76c2bd82f9468f51a1a54285476a635a1e9a3fa996873c73' 
  AND token = 'xWpPFQyhefqR8hnJfXXrTifMFT6JhP5YEgkl3DnlCNU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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