Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c9d01b016f57853fdecf01d701235b652f6f1c221c0712798986804a188b6677' 
  AND token = 'wE/VBpJpYVchd255iR0BuD2hSIrCa2pUU2dNsiRVGTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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