Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3c82f2d6894e7cfe05f2181b2ba8e1b90d2826d1cbb469a6301cd14693e9652' 
  AND token = 'fu1NUjov/DlNAFHFSfWqKceTj+YydGuXd5ssOhXgkSA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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