Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f0b9507c83c457589b84b9f18aafb5b5994c685fda9aef8a4d52b2bf2787ac2' 
  AND token = '8iJx7tBfzVXUdROoZD8x2LxUBIixivFIrEZfXqJn9xk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00071

JSON explain

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