Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1edb9ccf0ec7d68af8abc85f7a7e501645bfffd45a88a61cba78efdc8307ed1e' 
  AND token = 'f9pMXgjboxB0yJKJ6YX1TmJlVb0no8aY1vpq+vgpVzA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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