Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34bef2987ea5d0c30748954d7c5cd3e5c0979ca6ea969f8661f6a8985cd4fc75' 
  AND token = '+kjJt6bV3n6bheY0Wi+/zYbt/0rTzpk9/aQcZLoyRhg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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