Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cf2e5c6296775eb57d03634ef054e983078962907cfb6452f7b70388aa426521' 
  AND token = 'qCTB+XxRf/tKRmu0mY9YL61gnURpraLMavflAOCxiL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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