Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd7704e047c5573f77801c9135116dfecc48fd764e88b55faa7ec1ab6e18579ed' 
  AND token = 'dHiX5qHdUTouVczSxJ3veCNem3/vWn6qgot3pGjryxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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