Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2743e395ef6cb681f607d74f8ab18e39507ef2e9789e13abffa4a252ba6ccf02' 
  AND token = 'ZU0tcGC5m55Z/bRssaDlk2Xfm0892iNocYC1KKZH0qM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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