Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2a83c847eff9b5d669ee3b38e35529b1755318cc240fdb8c356da5974476ec45' 
  AND token = '5K/kSwx5WM0NqKy3bGbO2F+99dK28s9L7TBAUBSsrF0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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