Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56292207a13300a608a8a827a532d2ed53a61a49c92b7fc37448e941deb723cc' 
  AND token = 't9NGPM/XxSlGa+T39j9Lji1NJQ8bNzok76Dw07vZ5+Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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