Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90ae127c23e7133b1d0ecfeb1bfd1a8ba2a06e73f5c122e1f4b045bffd21e0ae' 
  AND token = '1tSef+38SfbuK0jQGznVUqOwRPRlqPpRUgi9k01lTUU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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