Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '544c69d217f183549f59e3d5033bc85a346e57300b5d624f732dfd1ce6033ea9' 
  AND token = 'LTPsFrm5AXzL/+9cDlP/7M7TlJeGoZLiQ1fBuMenx/U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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