Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9a36edfbbfb55dcc65ab47af5d2c31586fc5deee8172760e453e2a0f65d8688' 
  AND token = 'wMY7o5gHZYUFClmKTw1dSi5ZRQXMa02TgUH0JlN9vIw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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