Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c454b1a0f7f91e7ad7d12469e3373ebbf27dbdd49f6aa2a1e5db02b6fcdc23f' 
  AND token = 'Yrb26OCV6v6YkNbhn+GIz4T0ZXgE+ITwTnpz9fMfv78=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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