Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa568d415d97184191043ee8bfdbbcbd8f06fc76d3ebc05d9d8fcdef5ccaffd7' 
  AND token = 'TlC1ZxtH2LDJT2Vb9uKe0L2dhocUYP8IzaHA2Lwv5Mg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}