Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0f389f953c53609257a9b4fd78273d44c5f4385b6b1f67d05b2f59c437098f0d' 
  AND token = 'nlJca31lGBbA4S92cPxziPbGVYYXBGYfCaap5bPEobA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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