Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '40be3c6a019e5996538b3306c7c24e2ea3b62ee4c29525a31bdd2e78881cb7be' 
  AND token = 'SbxMN5Zb0QnhLJtLFxm1yDWsLulHRg8iZsDeXaKEGSk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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