Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '556a7a26911a6b46085ca34d0fe3fba20760f073f9dac767062685097a4d82f7' 
  AND token = '9W9EHf4Xf48uQFmqegWmgRWRv8iEb4NssvI8askURbs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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