Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06e30dc72cb0dc7c1d8b590ada2ac687c171189a1cfe1f74cc8d8fafb90a95a6' 
  AND token = 'IzYaTT8DmroawrewNCrvSBmueBWkWnlswD3yHEpOBnU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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