Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1e4a716a9206386e87ccbb6bf5eb9769c05256be451e2d739f057390b0db5ff5' 
  AND token = '6eAyR8ojLHrXQ3uQ1xALJ9jOe3B2RwBYNDh4zbAY1LI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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