Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '659259083fd712780cb6e8824d9f426beb47f0217d5b7cd7e7ea082f28c72540' 
  AND token = '6qIK3w9UivxFFMI0Nssk4KWuGxPuZYLNsyEmTWIHV34=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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