Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4cc99c1473c32bef70c72c0b67144cdcf158836e657db59c002f09bf5a3b459c' 
  AND token = 'MXPa31ImrYciD+zQ1tpQV9qM9GiPVwS1+40LkjvYFlY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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