Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14f250b023ec5c689fc6fcd04583e7b1f10d8f9bd443ced6840e87d403a60fec' 
  AND token = 'ZgrCno4w0p2lHQYxxTTNX+JRpRXLL7KlFKda4+a+PeA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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