SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ea6eebba11ec026fd9af38e57dd16573176468514bc60af2c6098e131b9bc416' 
  AND token = '3GHgDb65D3njQX5t+TwVguFW0+xuuv3hqSvVDlBXnv8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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