Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '733972f4ff44000b4ef2a36b9b0e5aa2a36097489e188c6c37c01cfc43d4a2f2' 
  AND token = 'NiN+oENWoh73WuHebDSUWcesQhm9tdVIaaOy/PiWJJ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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