Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '99b4433045c358331c18076f628aad254bc0434d40bbb5881823e5869a9b5843' 
  AND token = 'kEEW9BZ5ZQopqpTGGvpc5OX4FN5XME/zGvmRlHccdt8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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