Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fe42f1f47159c8f430dae6cb0de89e147ceae25664e5ff04684681560b77d607' 
  AND token = '9Xi56N/yPYgEBLXWHgZyy39P64aq9OGDlQ0e3F2XxqQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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