Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd97a4f1f89df18605a946d8b0f8c566160f6a0480aece7178bdb6383eadd0f7' 
  AND token = 'll/hTKXLE6I0R2xHi9ubjm7mGwZ+sOYNyBlR4zlfae0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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