Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fae404c353259721c1b396eed6efd5b32e18d6350f9fb88139d9da3c0ea3d99f' 
  AND token = '//YbSvpPtV5zWNSXwbLdVAQDCFhvDlR9tVCLNQrJ/tQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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