Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '485484bfafec83f3e611c8f073daefa8938ed42878c6d37903673a9815acd46f' 
  AND token = 'yN+gmfj7p9zRBp6+RClQIC2g+fzgDo3etPVB2kmGw3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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