Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '76c605adb64e9f62bf8411536d10c6602c582f79dbfe0f8609c150b1deabcf26' 
  AND token = 'da+u7/bFWk2jy6gd73ipVsA74xW/Mft65AnMLJ5D0L0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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