Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5a2ae6d918c7ab4709ada8e22b326c2f461ec4286abf0100fda0f0032f3a90bb' 
  AND token = 'j3YY2i6FgZRFhEkKdjSGYzR0bOgUwRCiQHxWmftOAEM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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