Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d009102234ba4d6209f61a56db1bf3c85d108441cbbb6947b9370745abdb126' 
  AND token = 'Tg/GeDA6nN7OFdWl886EmAj2z/OWWqohRQUN2cmcIKg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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