Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b8010f7a6303355e2db5f562dcc79d4be14abd2f9c9393642b4951b367fb6712' 
  AND token = 'uC7lsRkxoH80aSHogU2YSKwltJg9njRkHy0E28HjxJU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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