Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70f30c1ab38666949340077d9f4ee779f3d6425e899c0e3cf4d98f614f5ab1bf' 
  AND token = '4YhqYwyBvQ08MVGMPaWVdmOqZnV9C6VnO7eprkoAb14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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