Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7c6575cb375ddfedf551ea5db3e8a320416de4c54897a566fa989ddbdede03cd' 
  AND token = 'VWPpt3Uo38LXHEQQWRzfWjuWQCjfWG68aR4/uhI7nb8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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