Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a57e337b066cab3dc56f73bb054d2adacd15d8fe3beb128c0543870488e9500' 
  AND token = '4gbLU43dOs86dphJz6MQCVXtfRKCoR3U1N3Ba4BQbbQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00014

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}