Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c20bdb478e47000a948f3582059c4432d7c2f07b2db356bf0b46b4489396e8b1' 
  AND token = 'nsirVXNNy8BH1zOhQs047BI3TgmIGKqZBNRh9cXYNQ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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