Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '936f1c7d1a1b865c79a41442ff992650a74a1a6496b00795d63d38bfee14066d' 
  AND token = '0bQCen1Y8hGpnuVm5nUKkpnDGIbzgOi8wIvxfse10Cc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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