Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '71e36e301adeb9c070d5d08ffe3cdeb8682d522d04e76784f68e260afe058a86' 
  AND token = 'aDcTAqVyqKR5day2lyT+4DYM5Qrv1x66OV0xNyb+0w8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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