Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '307af9b4661a0326fd9a5f0f2df99491b4db475302d306cd252ec012e9a2c25e' 
  AND token = 'ZYePtbXOYmgSsXb6YEcV01Fjy0nk35Zi3Us+Qr310Yw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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