Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de82291e4d70e73c9f8b85aafa22c5465de2d6113490571fab4f4a545b80b084' 
  AND token = 'KG2+X1EbDzOem/J10/QFugZgeiwnbuUdUR0tME9nJYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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