Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4e8be9df92ae45fa1d408532ec1865cbd50bf50edc31a42460fc0d49e14e1219' 
  AND token = 'BoJPysrGzgc4PnOEiDAlWOzR53IA0hlJCxjcD+cUuPA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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