Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f799e0fb83d40105a986bd8baeb387b5a87f09c0ceb9c4b489ae9f357a5638c' 
  AND token = 'VAqCf3RQTjhSHYNlVGljSappUtr9YRjk01bqaV11ZIE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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