Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a302cd9bd145ef789743b0d18e75b704d5d9520ac1e2a37b39a510a8c3cef444' 
  AND token = 'pLT4hFI5kspgsRCTZDtOFqeRr/9xcqB75jHo2Hcl59g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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