Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56296ff20af509dcd24d95dbc6b72121288b3a6864a32899304640301c9b5442' 
  AND token = 'WdME+0uGtvPkza6zYIMBXxqDONnNqxiNKpaLss7jm4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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