Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2b417715e9fe0ae776e5dae22bfb0ef883b76acebaabfc7047e71ba92b40a1f0' 
  AND token = 'A9xDujkKcRfx9IV8BtJ660lH9Z4hIZYLZXQlSpJZ+0Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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