Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aa3a7b5d74888f1b0f6f3acfd4b848928508da70dc5e3770317c5dbb4dfda7d9' 
  AND token = 'kz0qMc7gUnVHBmCjetnYJVnQsNE0mTZkYg/6UivF3ms=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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