Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb3633bd3b896df5a196616a95511ec513f36483b5fda2075c4a56bcdf70055a' 
  AND token = 'OXpSEanANcQ9g4xbgfO5KWaQXgqfdz3Qt9brkeHOuKA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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