Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b204ec2eaf1c6c0d6333c8d6b2a5352851fcff0ab33fe4b81b8c7c15eac58887' 
  AND token = 'fD3LeDGDpG5PIEKQtdu7Sp69NrSdGnxxSxlfLKnRBQk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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