Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a068f98c449d59fbae08eb8a20df2bbed9ceeec1a547de292b89abf94876878' 
  AND token = 'jWpQ3esDUOLchXM26aQkbzuDJB2f7N7zelF4D7WC5fY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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