Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9545b79770cb1942074a4120ec37318574a70d9a44776221771b55b8f76172de' 
  AND token = 'xY8RoPWgaswil5N8FCEkPC+USznMC8J8zc8JiXhzVH8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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