Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0aed667872512216932dbce0432e9949c76c0dca253a106e50a66d0be60dbf59' 
  AND token = 'eWosUtQpNMbyU3pPrZshvglqXu5UPfjfH4uKMN0K7LU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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