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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '45be96034735e9ae3af40e9a572088ca10269d7d308a679ddad08409ec9cb1d2' 
  AND token = 'TSJOp5QwpcBEy0oZtUcs8j9nygqtnexFuXqAaHIISwI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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