Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2758bc6513a141a1fd726964955d89661f77423605c13876404437e365cff409' 
  AND token = 'LNp2/K31fdLHvy8DKagWCu3hIhcT3YyuOgZyU76RACY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}