Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14dc52b7e6e639f6405c8e9979d9382f66a32ef763d1c7a04eb33598ab061c5a' 
  AND token = '4FxXrZQRXgtmyt9JLZ43p3w6gd8NCHgG9j374JUCRJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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