Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '535240f18e8f0e025d20a267185592e789d70c92c0da7c1b88e640f132edafdc' 
  AND token = 'U7g7tGzyI/siIRj8OUmuFL80B74PVuJTnyXdzeeJzjw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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