Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a5002ba395663a29692a1df1329f362b044746c876f9c4782eea291612c9ceb' 
  AND token = 'HjbJlkNoUVgycxVBtLVXNzFzIGWdVwekn9/XcMioHfM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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