Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf4711c24b437bb444bc4e0588e09077c43928c98732d286ec481fae916db07c' 
  AND token = 'GhYECofb0Uw9Jhu1uOg4296t4HAo9/IFjE+JcwcjZE8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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