Sandbox

SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = '2a13bdb598ccc6e1c9ddde8151e94ead1d56f386705602d295aa6acb9f57e6a2' 
  AND token = 'ysnoJxGExsmK0wSoDn+R8bqrX6cYENcdCxMCaZhK64E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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