Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fd719f8f694408f547ddd556d9bd7cabda60598bafc164b822ef9c1bd73ce47c' 
  AND token = 'aoJAZQj4Q3i6I59K7qk71AXqvFTxszGQqOZ3MOn0gcU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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