Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e9696b72a801eadeaf87615aaf8857a67f8988b8cc06e0552655b972f0d79da' 
  AND token = '4X3LXrMzuOjKfmQQLYTQWW/QDc/abFWWsORAYvcop0E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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