Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2ee0793180340e59f9b6395ea534ac20db5f34fe55600249e4b97c7b8300cc96' 
  AND token = '6qUXa55JU1hf45iVylEk/RO9ZrfNu+bbfrgkWaljZMs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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