Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3f3aab4cb585fc42fa2b81be0076ef13f17784367ce71f41153f1b1ef45922b8' 
  AND token = 'U2+TT1wco6TwvK1UyjpOkuXQSkj5ob722FV0Agf8Lho=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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