Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34ffc938aec5d7fd7ee7bd5d4ba987bf2cd5149e32f825756950967db7f353db' 
  AND token = 'CUNTex1sF/UbutJ6jeml+OUXTCCes1xxkm12PKEz97w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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