Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '967b9011901cbfa4ec3da3031b3b60c7fe19fb15c118ccc89975d40d839496a3' 
  AND token = 'ThXhF4wND5Lo1mzHt6rFYcOsVxuS3HtASaGHO8cMPBw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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