Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a4385528cc2a79d17f785154e26dc207e48e38ed42ce9f812e9b606cf849fbe4' 
  AND token = '5v+O60MqOIbiONmo/Br/qwUCJ6Gsfev9EKY041keA8I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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