Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c877af01a49cda0e8deb136ac72b719bd342e834efe73a18da9fec561f4b970' 
  AND token = 'QlJZ8L0/1PrH4xaN6qg6nKpSXH1ncnEiwQ6zqLEtjpY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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