Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ae07659b8fb70c61bbe5d6c745bbe48b4126f8808ba6d3ab4dda53be30f4dd4d' 
  AND token = 'IUwixtaeWG5mt2DspVwuRq3FE09R95sfQYf7c+7bRXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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