Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a89c2e1520017bbab92d99b2935c817b5b080e761835af4b7757f3ec09794dbf' 
  AND token = 'KKMV2gBQtmKlEasIDABVhwjDRlfx+b7OPXlMOsZRu30=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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