Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '099879a5f458ed7ca727ae50c400c6113158b4e0569825434acd1a787767e1e6' 
  AND token = 'EBdT6S176HaH/T0ywo1nKO34iznLSpZzqo9KCB3ZB38=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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