Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7ce5682cf1c06a833ef955bf5e133ac0c00b8776887bb185bebb763c4de70b1f' 
  AND token = 'm6li7MkjhOzs0fI/2/AgNQpUNY7zZ9uQzhZOkgD5xM8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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