Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79a97ad490d6c352d2611edb776ec1e88c6c9cd296a276039ad78290664af897' 
  AND token = 'bMwoFsjhuvVQyyENQOK5uo1V6cdbjdCX8J9VhykARAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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