Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b75b5565492962c367cc46d5f2e1592fcb260880acedc04a8b7da6e804010f6f' 
  AND token = '7Tjvq9WN1lraUK6Fyse+r17exyXWT1tnnQh40ffI5Xg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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