Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '15039d18b6b296c9988d4a728f317324465492353128d0315e12524dbad2b6bf' 
  AND token = 'OpiHQymSBxqF55K3lBm9XonTSOXL+hrtwRi8AKmfnoc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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