Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '21c3bb1724cc00fdca7d90def929b920125c92f5d5e83b9f14fda936736950ae' 
  AND token = 'zI+y9Mgis7cfJVu5Kge7DKa9VjQBLyY0SvsFXUFOQI8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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