Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1366152ebbda4815e6ebdc547276ec6da70909c08bab7cfe0abe321bf46e89b8' 
  AND token = 'ISZ0byUk3Zw6yXpf9yrHEhip/tqGY6FGZ9HljgOGJ/c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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